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Cancer is one of the most threatening diseases humans face. Modern science has brought clinicians and scientists closer to finding a cure, but a true solution still evades the medical field. Strides have been made, however, in identifying cancer-causing agents called carcinogens. By educating the public on the dangers of these substances, scientists hope to prevent cancer exposure and save millions of lives.

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1. The History of Carcinogens

For hundreds of years, scientists have believed that certain substances could cause tumors. John Hill, a physician in the 18th century, first made the connection between tumors and tobacco in 1761. In 1915, physician Yamagiwa Katsusaburo and his assistant, Koichi Ichikawa investigated chemical carcinogens. This knowledge has helped modern scientists identify cancer-causing agents.

Carcinogens History Tobacco Chemical Tumors Matt Cardy / Getty Images
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This site offers information designed for educational purposes only. You should not rely on any information on this site as a substitute for professional medical advice, diagnosis, treatment, or as a substitute for, professional counseling care, advice, diagnosis, or treatment. If you have any concerns or questions about your health, you should always consult with a physician or other healthcare professional.